My art classes barely involved any teaching at all. We were basically showed what type of art we should create and then were told to produce one good art piece per over the course of a month. Obviously it doesn't work that way. First of all we are standing on the shoulders of giants. 99% of the time this means reading books and following their instructions. Second, your first attempt at anything is going to completely fail. You need practice, practice, practice. Your second attempt will be better than your first but we never got that chance. Your third will be even better than the second and so on. The way lessons should be structured would be to draw at least 5 small pictures every lesson with the expectation that you throw them away. Then at the end of the month, you could just pick your best one and show that one to your parents instead.